Bobbin

ABSTRACT

A yarn collecting bobbin comprising an elongated tube having a frustro-conical member having a yarn receiving outer surface affixed thereto is disclosed. The bobbin is so constructed that presently known paper tubes may be utilized as an integral part of its construction, thus resulting in a savings of material through recycling. An intermediate collar having means for positive connection to the tube by puncture penetration thereof by tooth portions thereof is disclosed. Also disclosed is a method of assembling the separate bobbin portions that may be advantageously practiced with the disclosed bobbin construction.

[451 Dec. 31, 1974 United States Patent [191 Pitts. et al.

BOBBIN Primary Examiner-George F Mautz Attorney, Agent, or Firm-AlbertP. Davis; Burnett W. Norton 0 .a w l. m; i wb nr m m C s n mmm r Wm B MN G .L SE]. a e md ob ho H TRMa & r o t n a v n I M 7 [73] Assignee:Lessona Corporation, Warwick, RI

Filed: Sept. 13, 1973 ABSTRACT A yarn collecting bobbin com Appl. No.:396,727

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through recycling. An intermediate collar means for positive connectionto the tube b penetration thereof b vfinlomm 38 E00 Ill Zh 45 pb 2% n .1a 8 1 .1 7 1 m .1 W38 l mH me M200 um l m6 m m u r a1 0 n &. I f C M mkUIF ii] 2 8 555 [ii y puncture closed. Also disclosed is a method of assseparate bobbin portions that ma 242/113 31 practiced with the disclosedbob 242/ll8.32 FOREIGN PATENTS OR APPLICATIONS 444,809

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BOBBIN The present invention relates to a yarn collecting bobbin andrelates, more particularly, to a new and novel yarn collecting bobbincomprising an elongated tube having a generally frusto-conical memberattached thereto at a lower portion thereof.

As used herein the term yarn means any type of attenuated materialeither textile or otherwise, and the term bobbin is employed in ageneric sense as applying to any type of yarn receiver.

Bobbins of various configurations, and constructed of various materialsare well known in the art. Such bobbins usually have a hole boredthrough the length thereof by which the bobbin can be placed on aspindle, skewer, etc., for rotation therewith. The bobbins are used tohold roving, yarn, thread, etc., which is wound into yarn packagesthereon as part of the processing of the yarn on a variety of machineoperations, such as spinning or twisting. The type of bobbin selectedfor any given wind-up operation will depend upon factors such as thesize and shape of the yarn package desired and upon the ultimate .use ofthe package.

With the advent of automatic tending mechanisms for spinning frames andthe like as disclosed in U.S. Pat. No. 3,403,866 it has become desirableto provide a bobbin comprising an elongated, tapered tube having afrustro-conical skirt affixed thereto and having a yarn engaging portionprojecting beyond the lower end of the skirt. As is fully disclosed inthe above cited patent, and with particular reference to the specificring rail traverse motion described therein, these so-called skirtedbobbins contribute to the production of cylindrical yarn packagesadapted for over-end unwindmg.

Such skirted bobbins are generally of unitary construction wherein thebarrel of the bobbin and the skirt are formed from molded plasticmaterial. While these unitary plastic skirted bobbins meet some of theneeds of the textile industry, such plastic bobbins are howeverexpensive. With the recognition that presently in the textile industrythere exists immense quantities of elongated, slender, hollow tubularbobbins (generally of plied paper construction with forward and baseends provided with metal wear ferrules) of the type customarily employedto wind up yarn on spinning and twisting machines and the like, and,further, there presently is capacity for the quantity production ofthese tubular bobbins it becomes evident that the production of askirted bobbin adapted from these tubular bobbins is a highly desirableproduct for use with automatic tending equipment.

Accordingly, the present invention is directed to the provision of askirted bobbin incorporating an elongated barrel or tubular portion withthe tubular portion having a slight taper over its full length, thetaper being such that the diameter of the tubular portion increases fromapex to base. This elongated tubular portion conforms to the present daytubular bobbins for spinning and twisting machines and the likediscussed above.

In accordance with the present invention a frustroconical memberencircles and it attached to the base end of the tubular portion bymeans of a separate collar also positioned on the tubular portion bymeans of a separate collar also positioned on the tubular member andintermediate said frustro-conical element. A short portion of thetubular member generally extends beneath the base portion of the elementfor purposes more fully brought out in the following copending andcommonly assigned patent applications, Ser. Nos. 145,753 and 145,726,both filed May 21, 1971 now respectively U.S. Pat. Nos. 3,782,657 and3,790,100. These bobbins are relatively inexpensive to manufacture andassemble and are easy to balance and maintain their balance over longcontinued. use, and are particularly suited for use with mechanismsoperable to commence winding of yarn on the bobbin automatically.

OBJECTS OF THE INVENTION It is an object of the invention to provide askirted yarn collector or bobbin which is suitable for use in automaticbobbin winding operations particularly those associated with automatictending mechanisms for spinning frames and the like.

Another object of the present invention is to provide a skirted bobbinwherein a skirt is attached to an elongated conical portion by means ofan intermediate collar in a rapid and efficient manner contributing toan overall bobbin construction which is economical and easy tomanufacture.

These and other objects of the invention will be brought out in thefollowing descriptive portions of the application. 1

DESCRIPTION OF THE DRAWING FIGS. 5a and 5b are partial sectional viewson an enlarged scale showing the biting action of the collar teeth anddemonstrates particularly how the placement thereof resists relativeaxial forward movement of the element and collar relative to the tubularmember; and

FIG. 6 is an assembly view showing particularly the methodby which thecomponents of the present bobbin are joined.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to the drawings ofthe disclosure of the present invention and particularly FIG.. 1thereof, a bobbin 10 is shown. Such bobbin is comprised of an elongatedgenerally cylindrical tube member 12, an element 14 having a generallyfrustro-conical outer strand receiving surface 16 and a collar 18 whichserves to positively connect the element 14 to the member 12 in apredetermined position thereon so as to present an overall bobbinconfiguration such as shown in FIG. 1 of the drawing. The tube member 12is of elongated generally cylindrical configuration having forward andbase ends 20 and 22 respectively. Both such ends of'the member 12 arepreferrably provided with a metal ferrule which enhances the wearcharacteristics of the resultant bobbin as is known in the art. Suchmember 12 generally is also of a type presently available in the textileindustry and employed on conventional textile machines for taking upyarn. Such member is generally formed of plied'paper or wood.

The element 14 is preferrably molded as by injection molding techniquesfrom a plastic material e.g., nylon, high density polyethylene orpolypropylene. The element 14 is further provided with a frustro-conicalouter surface 16 which is preferrably roughened or covered with asuitable frictional material to preclude the coils of yarn wrappedthereon from slipping off such surface. A bore 24 is provided at theforward end 28 of the element 14 and is dimensioned so as to snugglyreceive that portion of the tubular member being engaged therewith whenthe element is fixedly positioned at a predetermined location along thetubular member 12. The base end 30 of the element 14 is further recessedto form surface 26 which terminates in a series of ledges or steps 27,-29 and 31 for receipt of the collar 18 in a manner which will behereinafter brought out.

Referring now in particular to FIGS. 2, 3 and 4 of the drawings, theconstruction of the collar 18 is more particularly shown and includes amain circular portion 32 having a surface face 33 at one side from whicha plurality of legs 36 extend longitudinally thereof. The other side ofthe portion 32 terminates in a flange 34 of enlarged diameter. Each leg36 is in'turn provided with a terminal foot portion 38 havingrespectively in turn inner and outer surfaces 40 and 42. Each innersurface 40 is in turn provided with a tooth or projection 44 and theouter surface 42 is preferrably chamfered as at 46. As best seen in FIG.4 of the drawings the central circular portion 30 of the collar 18 isprovided with a plurality of pads 48 for engagement with the outersurface of the tubular member 12 at the particular position thereupon.The collar is further provided with a plurality of axially orientedslots 50 longitudinally positioned into or through the main circularportion 32 thereof and radially located behind each pad 48 so that theinner surface thereof receiving the tubular member 12 is able to giveslightly so as to accomodate various slight differences in diameter frommember to member.

The interrelationship of the collar 18 andthe element 14 is such thatthe surface 26 of the element is so radially dimensioned so that uponassembly of the two aforementioned components, face 33 of the collar 18is in abutting relationship with the step 27 of the element 14 such thatit forceably engages the foot portions 38 so as to in turn force theteeth 44 into the member 12 and thus firmly anchor the collar and fixedposition relative to the member. The penetration of the teeth into themember may be partial as shown in the drawings or complete and isdependent upon the particular material from which the member is made,the primary feature being that sufficient penetration to accomplish thenecessary holding action is brought about. Upon completed assembly itshould also be noted that the flange 34 is seated upon the step 29.

Means are also provided to positively anchor the element 14 inrelationship to the collar 18 in the above described position byultrasonically welding peripheral portions of the flange 34 to abuttinginner surface portions of the base end 22 of the element 14. In thisregard step 31 is positioned so as to receive the activating horn of aconventional ultrasonic welding device so as to fuse the above referredto surfaces together resulting in fillet 51 which serves to stake thecollar and element 14 together. It should be brought out that inasmuchas the terminal surface portions of the base end 30 of the element serveto contact yarn, such surface could be marred by contact with anultrasonic horn; accordingly step 31 is preferrably utilized for thispurpose. In this manner then the engagement of the collar teeth 44 isassured by means of the cooperation of surface 26 of the element 14.

A construction in which three separate bobbin parts are maintained so asto present an integral bobbin construction equivilant in performance toan unitary unit but one in which the cost is materially reduced and onewhich furthermore advantageously enables the re-use or recycling ofpresently available bobbins of known construction and availability isproduced. This aforementioned novel bobbin construction enables assemblyin a novel manner which lends itself to automation. I

Convenient assembly is accomplished by the provision of a fixture 52provided with a bore or recess 54 centrally thereof and a-boss 56upstanding therein. The recess further forms a radial flange 58 of apredetermined height whereupon assembly the base end end 22 of theresultant bobbin will project the desired distance below the base 30 ofthe element 14 thereof. In practice the fixture is mounted on a piston60 whereupon the tubular member 12 is positioned over the boss 56 intothe recess 54 and the collar 18 is thereupon slid over the tubularmember and positioned in a predetermined location therealong byabuttment with the forward portions of the flange 58 contacting a baseportions of the collar flange 34. Thereupon the element 14 is firmlygrasped as by contact with the engaging surface 64 of a collet 62 andthereafter forceably moved relative to the tubular member 12 and thecollar 18.

It is furthermore believed that the detailed manner in which the teeth44 bitingly engage and displace outer surface portion of the tubular'member 12 enhance the action by which the resultant assembly resistsnormally encountered'relative forces which tend to displace the largeror base end of the element 14 forwardly on the tube member as byaccidental striking thereof in use as best seen in FIGS. 5a and 5b ofthe drawings. In FIG. 5a, a slight upward deflection of the terminalfoot portions 38 is depicted by the forces departed thereto by therelative motion between the tubular member 12 and the collar 18 byreason of the placement or positioning of the collar thereabout. Oncethe collar 18 is positioned on the member, the forceful caming action ofthe inclined surface 26 of the element 14 when such is positionedrelative to the other members making up the finished bobbin forces theentire foot portions 38 and the teeth 44 downwardly in a clockwise arcas best shown in FIG. 5b so as to displace a portion of the outersurface of the tube member away. This action tends to further deform andfix the configuration of the teeth 44 to that shown by FIG. 5b wherein amore complete engagement with side portions of the resultant depressionin the surface of the tubular member is presented. This actionthus'presents a construction equipped to better prevent the morecommonly imparted forces to the collar 18 as depicted by the arrow inFIG. 5b from dislodging the collar therefrom.

What is claimed is:

1. A bobbin for receiving strand material comprising,

a generally circular collar positioned on said member and intermediatebetween said member and said element, said collar having means forpositive connection to both said member and said element, said means forconnecting said collar to said member comprising a plurality of teeth onan inner surface thereof, said teeth in engagement with outer surfaceportions of said member, and said collar having forward and base endscorrespondingly orientated with said forward and base ends of saidmember, said collar forward end having a plurality of longitudinallyorientated deflectable legs extending therefrom, each of said legshaving a terminal foot having upper and lower surfaces, said uppersurface in engagement with inner surface portions of said element andsaid inner surface having an inwardly extending tooth of such connectingmeans thereon.

2. The bobbin construction of claim 1 wherein said teeth are maintainedin engagement with outer surface portions of said member by innersurface portions of said element.

3. The bobbin construction of claim ll wherein the forward portion ofthe upper surface of each of said terminal feet is chamfered;

4. The bobbin construction of claim 1 wherein said teeth are ofgenerally rectangular configuration having side andbottom wall portions,said bottom wall thereof in generally full contact with portions of saidmember, said bottom wall of said teeth further being disposed towardssaid forward end of said member.

5. The bobbin construction of claim 1 wherein said collar base end isprovided with a plurality of discrete member contacting pads projectingfrom the inner surface thereof, said base end further provided with aplurality of longitudinally orientated slots projecting at leastpartially through said base end and each of said slots radiallypositioned behind a pad.

1. A bobbin for receiving strand material comprising, an elongatedgenerally tubular member having forward and base ends, an element havinga generally frustro-conical outer strand receiving surface positioned onsaid base end of said tubular member with the base of said elementorientated towards the base of said member to provide a zone of enlargeddiameter around said member and a generally circular collar positionedon said member and intermediate between said member and said element,said collar having means for positive connection to both said member andsaid element, said means for connecting said collar to said membercomprising a plurality of teeth on an inner surface thereof, said teethin engagement with outer surface portions of said member, and saidcollar having forward and base ends correspondingly orientated with saidforward and base ends of said member, said collar forward end having aplurality of longitudinally orientated deflectable legs extendingtherefrom, each of said legs having a terminal foot having upper andlower surfaces, said upper surface in engagement with inner surfaceportions of said element and said inner surface having an inwardlyextending tooth of such connecting means thereon.
 2. The bobbinconstruction Of claim 1 wherein said teeth are maintained in engagementwith outer surface portions of said member by inner surface portions ofsaid element.
 3. The bobbin construction of claim 1 wherein the forwardportion of the upper surface of each of said terminal feet is chamfered.4. The bobbin construction of claim 1 wherein said teeth are ofgenerally rectangular configuration having side and bottom wallportions, said bottom wall thereof in generally full contact withportions of said member, said bottom wall of said teeth further beingdisposed towards said forward end of said member.
 5. The bobbinconstruction of claim 1 wherein said collar base end is provided with aplurality of discrete member contacting pads projecting from the innersurface thereof, said base end further provided with a plurality oflongitudinally orientated slots projecting at least partially throughsaid base end and each of said slots radially positioned behind a pad.